BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-1420PA-CH/1433PA-CH

KT TECHNOLOGY PTE LTD.

KT433OP3C-WB/BI

Processor         80486SX/80486DX
Processor Speed   20/33MHz
Chip Set          OPTI
Max. Onboard DRAM 64MB
Cache             64/256KB
BIOS              AMI
Dimensions        327mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            J11       Turbo LED                 JP11

  Power LED & keylock         J20       Reset switch               SW1

  Speaker                     J21       Turbo switch               SW2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation            JP1           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP1           pins 1 & 2
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB       (4) 256K x 9       NONE           NONE           NONE

     1MB           NONE           NONE        (1) 256K x        NONE
                                                  36

     2MB       (4) 256K x 9   (4) 256K x 9       NONE           NONE

     2MB           NONE           NONE        (1) 256K x    (1) 256K x 36
                                                  36

     4MB        (4) 1M x 9        NONE           NONE           NONE

     5MB       (4) 256K x 9    (4) 1M x 9        NONE           NONE

     6MB       (4) 256K x 9    (1) 256K x    (1) 1M x 36        NONE
                                   36

     8MB        (4) 1M x 9     (4) 1M x 9        NONE           NONE

     9MB       (4) 256K x 9    (4) 1M x 9    (1) 1M x 36        NONE

     10MB      (4) 256K x 9   (4) 256K x 9   (1) 1M x 36     (1) 1M x 36

     12MB       (4) 1M x 9     (4) 1M x 9    (1) 1M x 36        NONE

     13MB      (4) 256K x 9    (4) 1M x 9    (1) 1M x 36     (1) 1M x 36

     16MB       (4) 1M x 9     (4) 1M x 9    (1) 1M x 36     (1) 1M x 36

     16MB       (4) 4M x 9        NONE           NONE           NONE

     20MB       (4) 1M x 9     (4) 4M x 9        NONE           NONE

     24MB       (4) 1M x 9     (4) 1M x 9    (1) 4M x 36        NONE

     28MB       (4) 1M x 9     (4) 1M x 9    (1) 4M x 36    (1) 256K x 36

     32MB       (4) 4M x 9     (4) 4M x 9        NONE           NONE

     36MB       (4) 1M x 9     (4) 4M x 9    (1) 4M x 36        NONE

     40MB       (4) 1M x 9     (4) 1M x 9    (1) 4M x 36     (1) 4M x 36

     52MB       (4) 1M x 9     (4) 4M x 9    (1) 4M x 36     (1) 4M x 36

     64MB       (4) 4M x 9     (4) 4M x 9    (1) 1M x 36     (1) 1M x 36

  Note:36-bit SIMM banks 2 & 3 are not installed on some board revisions.

                            CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG         Dirty Bit

     64KB        (4) 8K x 8     (4) 8K x 8     (1) 8K x 8    (1) 64K x 1
                                                at U34         at U46

     256KB       (4) 32K x 8    (4) 32K x 8   (1) 32K x 8    (1) 64K x 1
                                                at U34         at U46

           CACHE JUMPER CONFIGURATION

   Size      JP8       JP9      JP10      JP12

   64KB     Open      Open      Open      Open

  256KB     Open     Closed    Closed    Closed

                          CPU TYPE CONFIGURATION

       Size               JP3               JP4                JP5

      80486SX             Open              Open            pins 2 & 3
                                                             closed

      80486DX          pins 2 & 3          Closed           pins 1 & 2
                         closed                              closed